EN 1728 مقابل EN 581: أي معيار ينطبق على مقاعدك؟

Quick answer. These two standards are not competitors — they do different jobs. EN 1728 specifies the test methods used to check the strength and durability of seats. EN 581-2 sets the actual requirements for outdoor seating, and it calls up EN 1728's methods to do so — with more severe parameters for contract use than for domestic use. In your RFQ, cite the requirement standard and the level, not just "tested to EN 1728".

What each standard actually is

EN 1728 — Furniture — Seating — Determination of strength and durability — is a methods standard. It defines the test rigs, loads, load application points and cycle counts used to evaluate seat structures. It is referenced by many seating requirement standards, indoor and outdoor, but on its own it does not say "this bench passes".

EN 581 — Outdoor furniture — Camping, domestic and contract use — is the requirements family for outdoor furniture. EN 581-1 covers general safety requirements (design, stability, edges and shearing points); EN 581-2 covers the mechanical safety and strength requirements for seating, distinguishing severity levels for domestic and contract use; EN 581-3 covers tables.

EN 16139 — Non-domestic seating — Strength, durability and safety — sets requirements for contract seating used in public and commercial interiors (waiting areas, public buildings, hospitality), also built on EN 1728 test methods.

One way to keep the family straight: EN 1728 is the instrument, EN 581 and EN 16139 are the rules. The requirement standards decide what must be achieved; EN 1728 describes how the measurement is made. That division of labour is why a complete tender citation names both.

The standards family at a glance

Which one goes into your RFQ?

For municipal park benches (outdoor, public, uncovered): the usual citation is EN 581-1 + EN 581-2, with the request that the supplier state the severity level tested (contract use is tested more severely than domestic use).

For covered public spaces and non-domestic interiors: EN 16139 is the requirement standard commonly used for contract seating.

Where the projects overlap or the installation is unusual, projects may cite both families. The correct citation depends on the product and where it is installed — so the safest formulation is always: standard number + part + level + report. For example: "Benches shall meet the requirements of EN 581-2 at contract level; test methods per EN 1728; test reports from an accredited laboratory shall be provided on request."

Note that EN 16139 addresses non-domestic seating as a class; where a bench is installed outdoors and uncovered, EN 581-1 + EN 581-2 remains the usual citation. Confirm the intended citation with your specifier before it enters the tender document.

Domestic vs contract levels — why the level matters

EN 581-2 does not treat a garden bench and a city-centre bench the same way. Its severity levels exist because public seating is used harder: heavier and more varied users, standing loads on seat edges, vandalism exposure, and near-constant use rather than occasional weekend use. In practice that means higher loads and more test cycles at contract level than at domestic level.

The practical consequence for buyers: a report issued at domestic level says nothing about contract performance, and the two can differ by a wide margin. So the level is not fine print — it is the difference between a document that supports a municipal tender and one that does not. Always require the tested level to appear on the report itself, not just in the supplier's email.

The sentence most suppliers get away with — and why it is incomplete

"Tested to EN 1728" by itself does not tell you:

• against which requirement standard (581-2? 16139?),
• at which level (domestic or contract),
• for which product series the report was issued,
• or which laboratory issued it.

A methods standard is a tool, not a verdict. Any supplier can run EN 1728 methods at low loads and say the same words. Always ask the four questions above, in writing.

Three misconceptions that cost buyers money

1. "EN 1728 is a certificate." It is not — it is a test methods standard. The pass/fail requirements live in EN 581-2 or EN 16139. A supplier sentence of the form "Tested to EN 1728 per factory test report No. ___; certification status varies by factory — see each factory profile" is the level of specificity you should require.
2. "One report covers the whole range." Reports are issued per product/series and per level. A bench tested at domestic level is not automatically contract-level, and a side chair's report says nothing about a 180 cm public bench. If your order spans several models, ask which models the report actually covers — and in what size/configuration.
3. "Any EN number in a supplier's brochure is real." Low-quality online guides have circulated invented numbers — "EN 1619" is a recurring example in this category, and no such furniture standard exists. Verify every standard number in the official CEN catalogue before it goes into a tender document.

A final note on laboratories: the credibility of a report depends on who issued it. Reports from accredited independent laboratories carry more weight in municipal review than self-issued factory test records. Neither is worthless — but know which one you are looking at, and ask for the issuing body to be named on the report itself.

How this connects to the rest of your specification

Strength is only half of a bench specification. The other half is corrosion protection — coating systems, galvanizing thickness and salt spray performance — which is where outdoor furniture most often fails in coastal and winter-salt cities. For that side of the spec, see our guide to salt spray testing (ISO 9227).

For the full picture — load standards, anti-vandalism fixings and a tender-ready checklist — see the municipal park bench buying guide. To compare bench constructions and materials, browse the park & street benches category. For how factory documentation is checked before listing, see the verified factory directory.

References

• EN 1728:2012 — Furniture — Seating — Determination of strength and durability (CEN)
• EN 581-1:2017 — Outdoor furniture — Seating and tables for camping, domestic and contract use — Part 1: General safety requirements (CEN)
• EN 581-2:2015 — Outdoor furniture — Seating and tables for camping, domestic and contract use — Part 2: Mechanical safety requirements and test methods for seating (CEN; confirm current edition and amendments)
• EN 581-3 — Outdoor furniture — Seating and tables for camping, domestic and contract use — Part 3: Mechanical safety requirements and test methods for tables (CEN; confirm current edition)
• EN 16139:2013 — Non-domestic seating — Strength, durability and safety (CEN)
• Current editions should be confirmed in the official CEN catalogue when writing tender documents; standards are periodically revised.